Bolting-chest



2 SheetsSheet 1.

COGSWELL &-MCKIERNAN.

' Ventilatd Bolting Chest.

Patented June 12,- 1860..

. 2 Sheetsr-Sheet 2. COGSWELL & McKIERNAN.

' Ventilated BoltingGhest.

Patented lune 12,. 1860. I

s PMllrLilhcgnphen Waahingmn, ac,

UNITED STATES PATENT OFFICE.

M. G. C OGSWELL AND J. MCKIERNAN, OF BUFFALO, NEW YORK.

BOLTING-CI-IEST.

Specification of Letters Patent No. 28,654, dated June 12, 1860.

To all whom it may concern:

Be it known that we, MORTIMER C. Coos- WELL and JOHN MOKIERNAN, of the city of Buffalo, county of Erie, and State of New York, have invented certain new and use ful Improvements in Ventilated Bolting- Chests for Flour; and we do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the accompanying drawings and the letters of reference marked thereon.

Figure l is an end elevation, showing the arrangement of the gear wheels. Fig. 2 is a transverse section. Fig. 3 is a longitudinal section on line 0, (Z (Fig. 3). Fig. l is a longitudinal section on line AB (Fig. 2). Fig. 5 is an end View opposite the gearing. Fig. 6 is a transverse section, and Fig. 6 longitudinal section of the relative arrangement of the cant boards A, cylinder H and brush 1. Fig. 7 and Fig. 7 details for tubular shaft.

Letters of like name and kind, refer to like parts in each of the figures.

A, represents the shaft or axis of the bolting reel, which shaft is supported in ap propriate bearings at each end in the brldge trees P. It is made hollow or tubular for the purpose of admitting air through it, into the interior of the reel. It has long slots or openings as shown at 0, Fig. 3, for the purpose of allowing the air to escape into the perforated tube or cylinder D, and thence through the perforations on to the interior of the bolting cloths and thence through the-pores of the cloth, and thence passing out of the chest through the openings L.

For convenience of shipping, etc., the shaft is made in sections, and coupled together at the emboss or spider hub E. The shaft, and consequently the reel is set upon an inclination of from three eights to three quarters of-an inch to one foot of its length.

Air, is forced into the tubular shaft and hence through the bolting chest by means of the fan or blower B. The pipes L conduct the air from the fan to the tubular shaft.

D, represents a perforated metal cylinder which surrounds the shaft A, and is supported on the hub or emboss E as shown at c (Fig. 7 The perforations are made concave on the inside of the cylinder and convex on the outside, as shown at d so as to admit of a free passage of the air through the perforations at right angles to the shaft.

The convexity of the perforations on the outside of the cylinder will prevent the meal or flour from falling through into the cylinder. This form of the perforations is deemed of much importance, for the reason that if a simple round hole is made; which would leave the outside of the cylinder smooth the meal or flour would work into the holes and fill them up, and thereby prevent the free passage of the air and embarrass the operation, but by making the opening convex and raised upon the outside of the cylinder the flour or meal will slide off and leave the opening unobstructed, while the concavity upon the inside facilitates the free escape of the air through the holes atright angles to the shaft. These holes or perforations are easily made by using a conical punch having a flat round surface on the end (nearly the size of the hole) and gradually enlarging so as to give the required concavity. This cylinder may be made of thin sheet metal and about one inch larger in diameter than the shaft A, so as to leave a free space between them; M, reel spider arms, which are fitted to the tubular shaft (A) for the purpose of receiving the frame work or rib N, which is fitted in grooves in the ends of the arms and made fast thereto by screws or otherwise. The bolting cloth is tacked or nailed to the ribs N in the usual manner; P, truss rods, which pass through the spider arms and are tightened by screw nuts at each end; Q, stationary head board, upon which the stationary cylinder R is fastened. The object of the cylinder R is to prevent the air from passing out at the end of the reel, and also to prevent the meal from blowing out; S, rotating reel head which is fastened to the ribs N. It is so connected to the ribs, that its interior circle will revolve close around the stationary cylinder R, for the purpose (in combination with cylinder R) of preventing the air from passing out at the end of the reel; w, closed reel head; V, slats, fastened to the ribs N, for the purpose of tacking the end of the bolting cloth thereto; l/V, opening to allow the ofi'al to pass out of the reel; Y,

conveyers, built in an ordinary manner, and

for the common purpose of conveyors; Z, conveyer bottom; A flour spout; B return spout into lower conveyer C return out off slide; E fine middlings spout; F coarse middlings spout; G shorts spout; H spouts to conduct meal to the bolting reels; X, bran spouts; I bridge truss for journal bearings; J shaft for the purpose of throwing the brush I; L tubes to conduct the air from the fan to the tubular shaft A; NP, shaft to drive fan B; N pulleys; O pulleys on fan shaft; P belt passing around the pulleys l 2 and 0 Q3, cant boards in bolting chest for the purpose of conducting the flour to the conveyer; R gearing; X Y, bolting chest frame; G, cant boards which are so placed on an angle as to break the current of air which is passing through, and form a series of dead cavities between them, and thereby prevent the flour from passing off with the escaping air. They are so placed, that the lower edges will form a circular line by contracting the spaces, and allowing the air to pass over and under the edges alternately, so that the particles of flour which may have passed in will gravitate to the surface of the boards, and slide down to the rotating brush I, and thus, all the flour will be retained within the chest. Below these cant boards is the rotating cylinder I-I, supporting the brush I, which cylinder revolves ,in the concave J In the bottom of this concave, is an opening T, T, in which opening is a bridge K rising above the surface. As the cylinder and brush revolve the brush strikes the bridge, which causes the brush to spring and thereby clean itself the flour dropping through the openings T.

The fan blades ([9 are attached to the arms 6 at right angles thereto, so as to hold and force the air into the hollow shaft A. This fan may be placed within the bolting chest as represented in the drawings, or it may be placed in a convenient room outside of the chest, and air pipes so arranged and connected therewith as to take in air from the outside of the building. And it may also be so arranged as to take in dry air from a heated room in any convenient part of the building; to berso connected and used when the atmosphere without is very wet and damp. In some localities, and under certain circumstances it may answer to dispense with the fan altogether and take in air by means of a large funnel placed upon the outside of the building and connected to the tubular shaft by means of appropriate pipes, or the opening L. may be appropriately connected with a chimney, so as to produce a draught or suction through the described arrangement of parts.

In whatever way the air is caused to pass into the tubular shaft, it will radiate through the perforations of the cylinder, and fill the interior of the reel, and thereby cool and condense the flour, and pass through the pores of the bolting cloth in a manner to keep the pores of the cloth open, dry and unclogged. The flour being in this manner perfectly cooled and condensed, we are enabled to dispense with the use of the orinary cooler and use a finer quality of cloth, and hence obtain a purer and better quality of flour, and we are also enabled to use the bolting reel with equal facility at all times, as it does not become overheated nor clogged by constant and prolonged use.

To claim 1. The hollow shaft A. for the purposes and substantially as described.

2. The perforated cylinder D. in combination with the hollow shaft A. for the purposes and substantially as set forth.

3. The combination and arrangement of the rotating reel head S. with the stationary headboard Q and stationary cylinder R for the purposes and substantially as herein set forth.

4. The relative arrangement of the cant boards G cylinder H. brush I. bridge K and openings T. T. .for the purposes as set forth.

MORTIMER C. COGSWELL. JOHN MOKIERNAN.

fitness to the signature of Cogswell:

E. B. FORBUSH, W. H. FoRBUsH.

lVitness to the signature of McKiernan:

WM. L. TAYLOR, JOHN FOSTER. 

